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Race the cars!  Classroom/Home Simulator (See also: Students Building Simulators  Car Race)
Sample question for Level: Algebra 1 Problem:
Set RED CAR: Speed=15km/h and Start=24km and BLUE CAR: Start=0km.
Question: If the cars meet in 4 hours, what is SPEED of BLUE CAR?
Use the activity to find your answer and then talk about the math. Answer A: Using the activity.
 Set the 3 sliders.
 Think about what it means to "meet in 4 hours".
 Find t=4 on the horizontal axis.
 Move the 4th slider (speed of blue car) until the lines intersect above t=4.
 See that the slider is at 21km/h.
Answer B: Thinking about the math.
 Thinking: blue car has to "catch up" 24 km in 4 hours.
 This means it must go 24km/4h=6km/h faster than red car.
 The speed of red car is 15km/h.
 So the speed of blue car is 15km/h+6km/h=21km/h.
Please write in suggestions for good questions!

algebra, functions, lines, slopes, cars, distance, speed, time, velocity, dst, geogebra, application, geometry, program
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